diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 6be840e..8f39207 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -83,6 +83,7 @@ jobs:
               26.1.1:startup
               26.1.2:startup
               26.2:startup
+              26.3:startup
           - name: folia Java 17
             id: folia-java17
             platform: folia
@@ -110,6 +111,7 @@ jobs:
             cases: >-
               26.1.2:startup
               26.2:startup
+              26.3:startup
 
     name: ${{ matrix.name }}
     timeout-minutes: 45
diff --git a/README.md b/README.md
index f9add5e..b067e86 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,8 @@ integration.
 
 > DebugStickPro requires
 > [PacketEvents](https://github.com/retrooper/packetevents) 2.13.0 or later.
+> PacketEvents has no release with Minecraft 26.3 support yet, so 26.3 servers
+> need the 2.14.0 development build.
 >
 > The plugin is under active development. Test updates on a non-production server
 > and report reproducible problems on the issue tracker.
@@ -94,9 +96,9 @@ The server owner decides which commands and modes players may use.
 
 | Component | Requirement |
 | --- | --- |
-| Server software | Spigot, Paper, or Folia from Minecraft 1.19.4 through 26.2. Paper is the primary and recommended platform. |
+| Server software | Spigot, Paper, or Folia from Minecraft 1.19.4 through 26.3. Paper is the primary and recommended platform. |
 | Java runtime | The plugin targets Java 17. Run the Java version required by your chosen Minecraft server release. |
-| Required plugin | [PacketEvents](https://github.com/retrooper/packetevents) 2.13.0 or later. |
+| Required plugin | [PacketEvents](https://github.com/retrooper/packetevents) 2.13.0 or later. Minecraft 26.3 requires the 2.14.0 development build; 2.13.0 cannot load on 26.3. |
 | Optional plugins | CoreProtect and PlaceholderAPI. |
 
 VirtualEntities is bundled inside DebugStickPro and does not need to be installed
@@ -223,7 +225,7 @@ for custom locales, from English. Existing translations are preserved.
 
 | Symptom | Check |
 | --- | --- |
-| DebugStickPro does not enable | Confirm PacketEvents 2.13.0 or later is installed and enabled first. Check that the server and Java versions match the support table. |
+| DebugStickPro does not enable | Confirm PacketEvents 2.13.0 or later is installed and enabled first. On Minecraft 26.3, PacketEvents must be 2.14.0 or later. Check that the server and Java versions match the support table. |
 | The stick does nothing | Hold a plugin-issued stick in the main hand; verify `debugstickpro.use`, world lists, block filters, and region protection. |
 | Copy or Freeze mode is skipped | Grant `debugstickpro.mode.copy` or `debugstickpro.mode.freeze`. Grant `debugstickpro.mode` as well when the player uses the mode command. |
 | A property is missing | Check `BlockDataFilter`, its per-type bypass permission, and `AllowUnsafeBisectedData`. Some properties are intentionally unavailable for safety. |
@@ -239,6 +241,11 @@ versions also run in-game command, item, display, locale, and mode tests. Spigot
 protocol checkpoints are tested separately with the official BuildTools. Paper
 remains the primary platform.
 
+Because PacketEvents only publishes its unshaded modules, the runtime tests
+reassemble the installable PacketEvents plugin JAR from the same artifacts the
+official release is built from (`integration/packetevents`). Set
+`DSP_E2E_PACKETEVENTS_VERSION` to test a different PacketEvents version.
+
 ## Building from source
 
 Building requires JDK 25; the produced plugin JAR targets Java 17.
diff --git a/integration/mineflayer/run-server-e2e.sh b/integration/mineflayer/run-server-e2e.sh
index 78fa344..fd31701 100755
--- a/integration/mineflayer/run-server-e2e.sh
+++ b/integration/mineflayer/run-server-e2e.sh
@@ -13,9 +13,9 @@ readonly TEMP_DIR="$(mktemp -d)"
 readonly SERVER_DIR="${TEMP_DIR}/server"
 readonly CACHE_DIR="${DSP_E2E_CACHE:-${HOME}/.cache/debugstickpro-e2e}"
 readonly SERVER_JAR="${DSP_E2E_SERVER_JAR:-${CACHE_DIR}/${PLATFORM}-${MINECRAFT_VERSION}.jar}"
-readonly PACKETEVENTS_JAR="${CACHE_DIR}/packetevents-spigot-2.13.0.jar"
-readonly PACKETEVENTS_URL="https://github.com/retrooper/packetevents/releases/download/v2.13.0/packetevents-spigot-2.13.0.jar"
-readonly PACKETEVENTS_SHA256="6d9ece0d87ee727a79a20b7ffbd432021609c6f52bafcb654fc2d3e9b6f064c5"
+readonly PACKETEVENTS_VERSION="${DSP_E2E_PACKETEVENTS_VERSION:-2.14.0-SNAPSHOT}"
+readonly PACKETEVENTS_JAR="${CACHE_DIR}/packetevents-spigot-${PACKETEVENTS_VERSION}.jar"
+readonly PACKETEVENTS_FIXTURE="${PROJECT_DIR}/integration/packetevents/pom.xml"
 SERVER_PID=""
 
 cleanup() {
@@ -58,10 +58,16 @@ else
   echo "${server_sha256}  ${SERVER_JAR}" | sha256sum --check --status
 fi
 
-if [[ ! -f "${PACKETEVENTS_JAR}" ]] || ! echo "${PACKETEVENTS_SHA256}  ${PACKETEVENTS_JAR}" | sha256sum --check --status; then
-  curl --fail --silent --show-error --location "${PACKETEVENTS_URL}" --output "${PACKETEVENTS_JAR}"
+if [[ ! -f "${PACKETEVENTS_JAR}" ]]; then
+  # PacketEvents only publishes its unshaded modules, so the installable plugin
+  # JAR is reassembled from the same artifacts the official release uses.
+  mvn -B -q -f "${PACKETEVENTS_FIXTURE}" \
+    -Dpacketevents.version="${PACKETEVENTS_VERSION}" \
+    -Doutput.jar="${TEMP_DIR}/packetevents.jar" \
+    package
+  unzip -l "${TEMP_DIR}/packetevents.jar" plugin.yml >/dev/null
+  mv "${TEMP_DIR}/packetevents.jar" "${PACKETEVENTS_JAR}"
 fi
-echo "${PACKETEVENTS_SHA256}  ${PACKETEVENTS_JAR}" | sha256sum --check --status
 
 find_plugin_jars() {
   find "${PROJECT_DIR}/target" -maxdepth 1 -type f \
diff --git a/integration/packetevents/pom.xml b/integration/packetevents/pom.xml
new file mode 100644
index 0000000..601867d
--- /dev/null
+++ b/integration/packetevents/pom.xml
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>dev.twme.debugstickpro.integration</groupId>
+    <artifactId>packetevents-plugin</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>DebugStickPro PacketEvents test fixture</name>
+
+    <description>
+        Builds the installable PacketEvents plugin JAR used by the server
+        integration tests. PacketEvents only publishes its unshaded modules to
+        CodeMC, so the shaded JAR that a server installs is reassembled here
+        from the same artifacts the official release is built from.
+    </description>
+
+    <properties>
+        <packetevents.version>2.14.0-SNAPSHOT</packetevents.version>
+        <output.jar>${project.build.directory}/packetevents-plugin.jar</output.jar>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <repositories>
+        <repository>
+            <id>codemc-releases</id>
+            <url>https://repo.codemc.io/repository/maven-releases/</url>
+        </repository>
+        <repository>
+            <id>codemc-snapshots</id>
+            <url>https://repo.codemc.io/repository/maven-snapshots/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.github.retrooper</groupId>
+            <artifactId>packetevents-spigot</artifactId>
+            <version>${packetevents.version}</version>
+            <exclusions>
+                <!-- The server supplies Netty, and the official release JAR does
+                     not bundle it either. -->
+                <exclusion>
+                    <groupId>io.netty</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.jetbrains</groupId>
+                    <artifactId>annotations</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.6.2</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <outputFile>${output.jar}</outputFile>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                            <filters>
+                                <filter>
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/MANIFEST.MF</exclude>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                        <exclude>module-info.class</exclude>
+                                        <exclude>META-INF/versions/*/module-info.class</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/pom.xml b/pom.xml
index d98cbcb..7ebe78c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>dev.twme</groupId>
     <artifactId>DebugStickPro</artifactId>
-    <version>0.5.3</version>
+    <version>0.5.4</version>
     <packaging>jar</packaging>
 
     <name>DebugStickPro</name>
@@ -14,7 +14,7 @@
     <properties>
         <java.version>25</java.version>
         <java.release>17</java.release>
-        <paper.version>26.2.build.112-stable</paper.version>
+        <paper.version>26.3.build.33-alpha</paper.version>
         <adventure.compile.version>5.2.0</adventure.compile.version>
         <adventure.runtime.version>4.26.1</adventure.runtime.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -153,7 +153,7 @@
         <dependency>
             <groupId>com.github.retrooper</groupId>
             <artifactId>packetevents-spigot</artifactId>
-            <version>2.13.0</version>
+            <version>2.14.0-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>